Improvement in latch-locks



ittitali hm NICHOLAS PE-TR, NEW YORK, N. Y.

Letters Patent No. 111,567, dated February 7, 1871.

IMPROVEMENT IN LATCH-LOCKS.

The Schedule referredto in these Letters Patent and making part of thesame.

Toall whom it may concern.'

Be it known that I, NIcHoLAs Pnrnr, of the city county, and State of NewYork, have invented certain new and useful Improvements in Latch-Locks;and I do hereby declare the following to be a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings making a part of this specification, in which- Figure 1represents a View oi theinterior of the lock, the backplate beingremoved to show the interior.

Figure 2 represents a longitudinal transverse section through the lockand plate.

Figure 3 represents the position ofthe several parts of the lock whenthe` bolt is thrown outA ot' action,

with the knob-shaft or itslevers, so as not to be moved by them. c

Figurel 4 represents, in perspective, the interior side of theback-plate, to show the studs or pivots thereon for guiding anddirecting some of the moving parts 0i' the lock, said studs, forcheapness, being cast on and with'said plate.

Similar letters of reference, where they occur in the several drawings,represent like partsof the lock in all of them.

This invention consists in the manner in which the bolt, its'hinged limbor member, spring, stops, and guides are connected, arranged, andoperated by a pivoted lever from the exteriorof the lock, to throw outor let in the knob attachments, as may be required.

To enable others skilled in the art to make and use my invention, I willproceed to describe the same with reference to the drawings.

The lock-case A is cast with its flanges, studs, and openings on and init, as is also the back-plate B, so that they will not onlyr droptogether without ttngs, but also furnish guides, supports, and stops forthe several interior moving or operative parts, of which there arebut-tive, as follows The bolt C; its hinged limbA or member, D'; 'thelever E; the hub and its arms F, that are operated by the knob-shank orshaft; and the spring G.

The bolt is cast with van opening, a, in it, so that it may more pastand be guided by a projecting piece, b, that is cast on and with thelock-oase A.

From the upper rear end of the opening a a recess, c, is made, thatwill, when the bolt isv thrown out of actionrwith the arms F, take inthe permanent projecting piece b, and prevent the bolt from being movedin or out of the lock, or in other words, lock it.

There is also cast upon the bolt a recessed lng, e,

in va hole, in which'the pivot or stud d of the hinged limb D drops,andvwhereon it works.4

The spring G bears against this lug c, and the tendency of the spring isconstantly to force'the bolt out of the lock-case and upward, to keep itin a posi tion to be caught and drawn in by the arm F, ope rated fromwithout by the knob. v

The lever Fris pivoted by the stud j, cast on the inside of the plate B,which stud passes through the hole g cast in the lever.

This lever E is designed for moving the bolt C out of action with theturning arms F, as shown in tig. 3, and when so thrown out it is doneagainst the resistance ot' the spring G, the reactionary power oi' whichis constantly exerted to force it (the bolt) back into its workingposition and connect-ion, as seen' at ii 1.

gThe limb or member D is pivoted, as heretofore mentioned, to the bolt Cat d, and this limb has cast in and with it a slot, j, into whicha stud,i, cast on the plate B, enters, and by which stud' said limb D iscontrolled when the bolt proper, of which it is really a part, is thrownout of or allowed to come into action, as explained.

The moving oi' the lbolt C out of action causes the 'limbDto also moveout ofv action, its stud i serving as a stationary'fulcrum, upon whichit swings.

When the lever E isA moved so as to allow the bolt to be returned intoaction by therecoil of the spring G, the limb D is also. swung upon itslhinge at d, caused by the stationary stud t', to also swing into actionwith the arms F. f

h h are stops against which the rear end of the bolt aswell as of' itshinged limb D take to prevent the bolt from coming too far within thelock-.case

While I prefer the single spring G for accomplisln.l

ing the two movements of the bolt, viz., upward and outward, yet for thepurpose of evading m y invention two springs' may be used, one to forcethe bolt lin one direction aud the other in the other' direction.

This Il should regard asan obvious change, but still a part ot' myinvention. f

Having thus fully described' my invention,

What I claim therein as new, and desire to secu-re by Letters Patent,is-

In combination with the bolt `C and tripping-lever E, the hinged pieceor limb D and its slot j and pin fi, and the spring Gr, moving on theinclinec, for the double purpose ofv allowing the bolt to be thrown andheld out of and to be returned into action with thc arms F, theparts'being arranged to operate substantiallyas described.

N. PETR. lVitnesses WILLIAM WEBB, Pn'rma M. MORGAN.

